`libStart` already has ALSR slide added to it. Do not add it twice.
https: //codereview.chromium.org/2696903002/
Review-Url: https://codereview.chromium.org/2928083004
Cr-Commit-Position: refs/heads/master@{#46152}
Reason for revert:
Seems to lead to more (completely) misattributed ticks
Original issue's description:
> [tickprocessor] Consider top of the stack as pc if it points to a code object.
>
> Previously, we would only consider it if it pointed to a full-code JS function.
> Thus we could miss both optimized functions and bytecode handlers if they
> called frame-less code.
>
> Review-Url: https://codereview.chromium.org/2822433002
> Cr-Commit-Position: refs/heads/master@{#44640}
> Committed: 4433ac299eTBR=jarin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
Review-Url: https://codereview.chromium.org/2844053003
Cr-Commit-Position: refs/heads/master@{#44921}
Previously, we would only consider it if it pointed to a full-code JS function.
Thus we could miss both optimized functions and bytecode handlers if they
called frame-less code.
Review-Url: https://codereview.chromium.org/2822433002
Cr-Commit-Position: refs/heads/master@{#44640}
This adds optimization and deoptimization counts to the Web UI. Also, the function timeline
now shows optimization and deoptimization marks.
Review-Url: https://codereview.chromium.org/2753543006
Cr-Commit-Position: refs/heads/master@{#44033}
- lower the cutoff-threshold for bottom up graphs to 1%
- show all builtins/stubs/ics by default
R=jkummerow@chromium.org
Change-Id: I522173155b817ae20a37c40ecf411f2b55d82105
Reviewed-on: https://chromium-review.googlesource.com/452482
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43717}
- lower the cutoff-threshold for bottom up graphs to 1%
- show all builtins/stubs/ics by default
R=jkummerow@chromium.org
Change-Id: I85f8c4f00c5f36407bc5d9f81bead8f39a5ef632
NOTRY=true
Change-Id: I85f8c4f00c5f36407bc5d9f81bead8f39a5ef632
Reviewed-on: https://chromium-review.googlesource.com/452300
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43704}
Reason for revert:
AAAAAHHHHHHH
Original issue's description:
> [tools] Fix RegExp for ticksprocessor.
>
> Properly attribute all builtins, bytecode handlers and other stubs to
> the calling function unless --separate-ic is passed.
>
> R=jarin@chromium.org
> NOTRY=true
>
> Review-Url: https://codereview.chromium.org/2668953002
> Cr-Commit-Position: refs/heads/master@{#42849}
> Committed: 42011d2997TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review-Url: https://codereview.chromium.org/2664033005
Cr-Commit-Position: refs/heads/master@{#42851}
Properly attribute all builtins, bytecode handlers and other stubs to
the calling function unless --separate-ic is passed.
R=jarin@chromium.org
NOTRY=true
Review-Url: https://codereview.chromium.org/2668953002
Cr-Commit-Position: refs/heads/master@{#42849}
When exporting `shared-library` in profile log, additionally export a
slide offset. This is required to parse profile logs generated on
systems with ASLR (OS X), otherwise it is impossible to assign C++
symbol names to their addresses in the log.
See: https://github.com/nodejs/node/issues/6466
BUG=
Review-Url: https://codereview.chromium.org/1934453003
Cr-Commit-Position: refs/heads/master@{#35921}
Despite man page documentation:
-f Display the symbol table of a dynamic library flat (as one
file not separate modules).
`nm` on mac treats `-f` as a shorthand for `-format`. The `-f` argument
does not seem to be required, so just remove it completely.
(For `-format` documentation - see `nm --help` on mac).
BUG=
Review URL: https://codereview.chromium.org/1840633002
Cr-Commit-Position: refs/heads/master@{#35445}
(1) --prof-cpp: Collects ticks like --prof, but ignores code creation events to reduce distortion (so all JS ticks will be "unaccounted"). Useful for profiling C++ code.
(2) --timed-range flag for tick processor: Ignores ticks before the first and after the last call to Date.now(). Useful for focusing on the timed section of a test.
Review URL: https://codereview.chromium.org/802333002
Cr-Commit-Position: refs/heads/master@{#26168}
Added a console parameter for source map to the tick processor.
The tickprocesspor reads in the source maps and uses it to output the original filename, line number and column in the profile.
Modified d8 to output column numbers into the log, since this is needed to do source mapping.
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/22897021
Patch from Daniel Kurka <dankurka@google.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16307 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Their values are not used neither by the tick processor nor by CpuProfiler so it is just a waste of space.
TickSample used to be a transport for grabbed register values to TickSample::Trace, now they are passed in a special structure RegisterState which is allocated on the stack for the sampling period.
Some common pieces were moved from platform-dependent code into Sampler::SampleStack and TickSample::Init.
BUG=None
R=jkummerow@chromium.org, loislo@chromium.org
Review URL: https://codereview.chromium.org/18620002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15484 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The main issue was due to multiple recompilations of functions. Now
code objects are grouped by function using SFI object address.
JSFunction objects are no longer tracked, instead we track SFI object
moves. To pick a correct code version, we now sample return addresses
instead of JSFunction addresses.
tools/{linux|mac|windows}-tickprocessor scripts differentiate
between code optimization states for the same function
(using * and ~ prefixes introduced earlier).
DevTools CPU profiler treats all variants of function code as
a single function.
ll_prof treats each optimized variant as a separate entry, because
it can disassemble each one of them.
tickprocessor.py not updated -- it is deprecated and will be removed.
BUG=v8/1087,b/3178160
TEST=all existing tests pass, including Chromium layout tests
Review URL: http://codereview.chromium.org/6551011
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6902 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The problem appeared due to a fact that stubs doesn't create a stack
frame, reusing the stack frame of the caller function. When building
stack traces, the current function is retrieved from PC, and its
callees are retrieved by traversing the stack backwards. Thus, for
stubs, the stub itself was discovered via PC, and then stub's caller's
caller was retrieved from stack.
To fix this problem, a pointer to JSFunction object is now captured
from the topmost stack frame, and is saved into stack trace log
record. Then a simple heuristics is applied whether a referred
function should be added to decoded stack, or not, to avoid reporting
the same function twice (from PC and from the pointer.)
BUG=553
TEST=added to mjsunit/tools/tickprocessor
Review URL: http://codereview.chromium.org/546089
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3673 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
As this is only needed for internal profiling (not for DevTools),
the following approach had been chosen:
- during snapshot creation, positions of serialized objects inside
a snapshot are logged;
- then during V8 initialization, positions of deserealized objects
are logged;
- those positions are used for retrieving code objects names from
snapshot creation log, which needs to be supplied to tick processor
script.
Positions logging is controlled with the new flag: --log_snapshot_positions.
This flag is turned off by default, and this adds no startup penalty.
To plug this fix to Golem, the following actions are needed:
- logs created using 'mksnapshot' need to be stored along with VM images;
- tick processor script needs to be run with '--snapshot-log=...' cmdline
argument.
BUG=571
Review URL: http://codereview.chromium.org/551062
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3635 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Turned on with '--log-producers' flag, also needs '--noinline-new' (this is temporarily), '--log-code', '--log-gc'. Not all allocations are traced (I'm investigating.)
Stacks are stored using weak handles. Thus, when an object is collected, its allocation stack is deleted.
Review URL: http://codereview.chromium.org/267077
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3069 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
